A deal has an amount on it. The line items attached to that deal say something else. Both are in the CRM, and reports disagree depending on which one they read.
Recalculates annual contract value from the line items actually attached to the deal, including recurring billing terms, and corrects the deal where the stored figure has drifted from what the line items support.
A contract signed in October does not sit inside one year. Depending on whether you are asking a calendar or a fiscal question, the same contract produces different annual figures, and both are correct answers to different questions. The service calculates across those boundaries rather than picking one and hoping the reader wanted that one.
The corrected value, onto the deal. Arithmetic over dates and amounts, nothing inferred and nothing estimated. If the line items do not support a figure, none is written.